______ he had broken the record, he would be a world-famous runner now.
| A．When | B．Because | C．If | D．Though |
Great efforts___________grain production must be made if food shortages are to be avoided.
| A．to have increased | B．increased |
| C．to increase | D．to be increased |
Jone’s father was among the first to make his fortune in___________is now known as the most fantastic tourist attraction—Hawaii.
| A．where | B．what | C．which | D．that |
___________it in the flesh, I would never have known the drought in southwest China is so serious and people are suffering so much.
| A．Had I not seen | B．If I did not see |
| C．Should I not see | D．Were I not seen |
---Has anybody decided to enter for the competition?
---Two have shown interest, but___________ has filled in the application form.
| A．either | B．neither | C．none | D．both |
---You seem to be burning yourself out with so much work!
--- ___________.I’m dying for a thorough rest and a good workout.
| A．Generally | B．Actually | C．Typically | D．Exactly |